eclipseME and Antenna

using eclipseME and Antenna for preprocessing

First setup eclipseME and Anteanna as described in eclipseME docs. Now use Export Antenna Build Files to create the intial build file setup.

To successfully run the build.xml, be sure to put the jdk's bin directory into the path. Otherwise an error like [wtkpackage] JAR file creation failed with error -1 will indicate problems during preverification.

To do preprocessing in java, just add the //#if and //#endif directives (see also http://antenna.sourceforge.net/#preprocess ) to the java file. To prevent compilation problems on doubled code lines, just also mark the one excluded during you programming wiht //#. Antenna will comment these lines in, also, if they are within a valid if/endif section.

I had to add the preprocesser task to my build.xml file (and also used the same sourcedir/destdir - so know, what you are doing...). It was also necessary to inclue the taskdef from anteanna's jar file, so that the wtkpreprocess is defined.

<!-- Preprocess any source file. -->
<target name="-preprocess" description="preprocess the source files">
	<echo message="preprocessing for symbols: ${preprocessor.symbols}" />
	<taskdef resource="antenna.properties">
	     <classpath location="${path.antenna.jar}"/>
	</taskdef>
	<wtkpreprocess srcdir="${basedir}/src" destdir="${basedir}/src" symbols="${preprocessor.symbols}">
	</wtkpreprocess>
</target>

Of course, the preprocess task needs to be called before build and build.xml was changed accordingly.

<!-- Build the classes that make up the midlet -->
<target name="build" depends="-initialize,-preprocess,-eclipseme-build"
	description="Builds the classes that make up the project">
</target>

As you can see, the ant task uses ${preprocessor.symbols}. Just define them in the user-build.properites:

preprocessor.symbols=MIDP2,Nokia

Now go for your java sources and you may include something like

//#if MIDP2
//# setFullScreenMode(true);
//#endif

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